Q. Pb and Sn are extracted from their chief ore by
A) Electrolysis and self reduction
B) Self reduction and electrolysis
C) Carbon reduction and self reduction
D) Self reduction and carbon reduction
Explanation
(d)
$PbO$ and $PbSO_{4}$ get reduced by $PbS$ itself which is already present in mixture, because the reduction takes place by mixture itself, hence is known as self reduction
$2PbO + PbS\overset{\mathrm{\Delta}}{\rightarrow}3Pb + SO_{2} \uparrow$
$PbSO_{4} + PbS\overset{\mathrm{\Delta}}{\rightarrow}2Pb + 2SO_{2} \uparrow$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.